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Finding the Fourth Proportional to 28,007.40, 42,011.10 and 16,948.20

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Solution

The fourth proportional to 28,007.40, 42,011.10 and 16,948.20 is: 25,422.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,007.40 : 42,011.10 = 16,948.20 : x
  2. Step 2: Convert to fraction form
    28,007.40/42,011.10 = 16,948.20/x
  3. Step 3: Cross multiply
    28,007.40x = 42,011.10 × 16,948.20
  4. Step 4: Simplify right side
    28,007.40x = 712,012,525.02
  5. Step 5: Solve for x
    x = 712,012,525.02/28,007.40
  6. Step 6: Final answer
    x = 25,422.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.